The messianic psalms are perhaps the most commonly known type. They predict the coming of a messiah. Franz Delitzsch broke these psalms down into five kinds. The first is the purely prophetic, which predicts that a future Davidic king would be the Lord (Ps. 110). Second, the eschatological psalms predict the coming of Messiah and the consummation of His kingdom (Pss. 96-99, et al.). Third, we have the typological-prophetic in which the writer describes his own experience but goes beyond that to describe what became true of the Messiah (e.g., Ps. 22). Fourth, there are the indirectly messianic psalms composed for a contemporary king but having ultimate fulfillment in Messiah (Pss. 2: 45; 72). Fifth, we have the typically messianic in which the writer was in some way typical of Messiah, but all he wrote in the psalm did not describe Him (e.g., Ps. 34:20; 109:8 as used in Acts 1:20).10The following seem to be messianic psalms in whole or in part: 2 (cf. Matt. 3:17; Acts 13:33; Heb. 1:5; 5:5; 7:28; 2 Pet. 1:17); 8 (Matt. 21:15-16; Heb. 2:6-9); 16 (Acts 2:25-28; 13:55); 22 (Matt. 27:46; Mark 15:34); 34; 40; 41; 45 (Heb. 1:8-9); 68; 69 (John 2:17; 15:25); 72; 96-99; 102; 109; 110; and 118 (Matt. 21:42).11
The imprecatory psalms are thought of as a distinct type by some interpreters on the basis of their subject matter.12These psalms contain imprecations, or curses, on God's enemies. They have created a problem for some Christians since Jesus Christ taught His disciples to bless their enemies and not to curse them (Matt. 5:43-44; Luke 6:27-28; cf. Rom. 12:14). In the progress of revelation it was not easy for the writers of the psalms to see the details of the future distinctly. They could not feel the peace about God's ultimate establishment of justice that modern believers who know their Bibles do. Consequently when they witnessed injustice and oppression they did not usually know how God would deal with it so they called on Him to vindicate Himself immediately. With the coming of Jesus Christ and the added revelation He provided believers now have a fuller picture of how God will balance the scales of justice. It is therefore inappropriate for us to pray imprecations of the sort we find in the Old Testament. God has recorded them for our benefit, not as examples to follow in their wording but in their spirit of zeal for God's glory.13
What is now the most common way of classifying the psalms originated with the German scholar Hermann Gunkel at the beginning of the twentieth century.14He was one of the founders of the form critical school of scholarship that sought to understand a given portion of Scripture by analyzing the form in which the writer composed it. Scholars then compared that form with other biblical and contemporary literature from the ancient Near Eastern countries that were Israel's neighbors, particularly Egypt and Mesopotamia. Gunkel classified the psalms into various categories or types (Germ. gattungen) by trying to identify the general situation in life (Germ. sitz im leben) that brought them into existence rather than by their content. He concluded that most of the psalms were postexilic. Many scholars have followed this form critical approach in their study of the Psalms as well as in other portions of the Old Testament.15
Most form critical scholars speculated about the origins of the various psalms and concluded that priests wrote most of them late in Israel's history. This has led many conservatives to reject form criticism completely. Nonetheless this school of interpreters has given us some helpful information, namely the various literary types of psalms that appear in the book.
Some of the more important types of psalms by literary form are the following. Individual laments are psalms by individuals calling on God for help from distress. National laments are similar but voice a corporate cry for help in view of some national situation.
"Laments outnumber every other kind of psalm in the Psalter; almost a third of the psalms belong to this category."16
Thanksgiving psalms--also called psalms of declarative praise--center on some act of deliverance God granted His people. Descriptive praise psalms offer praise to God for Himself or for His general working rather than for a specific instance of His working. The poets wrote the pilgrim psalms, also called songs of ascent, for singing by the Israelites as they made their thrice-yearly pilgrimages up to Jerusalem for the required festival observances there. Royal psalms are those in which the king of Israel is the chief character. Some event in his reign is being described such as his coronation, wedding, or going out to battle. The enthronement psalms speak of the Lord as the great king fulfilling His role in some way such as reigning or coming to judge.
Another type of psalm, based on the form in which the writer set it rather than on the subject matter, is the acrostic. In these each verse, or group of verses in the case of Psalm 119, begins with the succeeding letter of the Hebrew alphabet. The psalmists adopted this style so the Israelites could memorize and remember the psalm easily. The acrostic psalms are these: 9, 10, 25, 34, 37, 111, 112, 119, and 145.17
